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|
from __future__ import annotations
import collections
import copy
import math
import operator as op
import pytest
from pint import pint_eval
from pint.util import (
ParserHelper,
UnitsContainer,
find_connected_nodes,
find_shortest_path,
iterable,
matrix_to_string,
sized,
string_preprocessor,
to_units_container,
transpose,
)
class TestUnitsContainer:
def _test_inplace(self, operator, value1, value2, expected_result):
value1 = copy.copy(value1)
value2 = copy.copy(value2)
id1 = id(value1)
id2 = id(value2)
value1 = operator(value1, value2)
value2_cpy = copy.copy(value2)
assert value1 == expected_result
# Inplace operation creates copies
assert id1 != id(value1)
assert value2 == value2_cpy
assert id2 == id(value2)
def _test_not_inplace(self, operator, value1, value2, expected_result):
id1 = id(value1)
id2 = id(value2)
value1_cpy = copy.copy(value1)
value2_cpy = copy.copy(value2)
result = operator(value1, value2)
assert expected_result == result
assert value1 == value1_cpy
assert value2 == value2_cpy
assert id(result) != id1
assert id(result) != id2
def test_unitcontainer_creation(self):
x = UnitsContainer(meter=1, second=2)
y = UnitsContainer({"meter": 1, "second": 2})
assert isinstance(x["meter"], int)
assert x == y
assert x is not y
z = copy.copy(x)
assert x == z
assert x is not z
z = UnitsContainer(x)
assert x == z
assert x is not z
def test_unitcontainer_repr(self):
x = UnitsContainer()
assert str(x) == "dimensionless"
assert repr(x) == "<UnitsContainer({})>"
x = UnitsContainer(meter=1, second=2)
assert str(x) == "meter * second ** 2"
assert repr(x) == "<UnitsContainer({'meter': 1, 'second': 2})>"
x = UnitsContainer(meter=1, second=2.5)
assert str(x) == "meter * second ** 2.5"
assert repr(x) == "<UnitsContainer({'meter': 1, 'second': 2.5})>"
def test_unitcontainer_bool(self):
assert UnitsContainer(meter=1, second=2)
assert not UnitsContainer()
def test_unitcontainer_comp(self):
x = UnitsContainer(meter=1, second=2)
y = UnitsContainer(meter=1.0, second=2)
z = UnitsContainer(meter=1, second=3)
assert x == y
assert not (x != y)
assert not (x == z)
assert x != z
def test_unitcontainer_arithmetic(self):
x = UnitsContainer(meter=1)
y = UnitsContainer(second=1)
z = UnitsContainer(meter=1, second=-2)
self._test_not_inplace(op.mul, x, y, UnitsContainer(meter=1, second=1))
self._test_not_inplace(op.truediv, x, y, UnitsContainer(meter=1, second=-1))
self._test_not_inplace(op.pow, z, 2, UnitsContainer(meter=2, second=-4))
self._test_not_inplace(op.pow, z, -2, UnitsContainer(meter=-2, second=4))
self._test_inplace(op.imul, x, y, UnitsContainer(meter=1, second=1))
self._test_inplace(op.itruediv, x, y, UnitsContainer(meter=1, second=-1))
self._test_inplace(op.ipow, z, 2, UnitsContainer(meter=2, second=-4))
self._test_inplace(op.ipow, z, -2, UnitsContainer(meter=-2, second=4))
def test_string_comparison(self):
x = UnitsContainer(meter=1)
y = UnitsContainer(second=1)
z = UnitsContainer(meter=1, second=-2)
assert x == "meter"
assert "meter" == x
assert x != "meter ** 2"
assert x != "meter * meter"
assert x != "second"
assert y == "second"
assert z == "meter/second/second"
def test_invalid(self):
with pytest.raises(TypeError):
UnitsContainer({1: 2})
with pytest.raises(TypeError):
UnitsContainer({"1": "2"})
d = UnitsContainer()
with pytest.raises(TypeError):
d.__mul__([])
with pytest.raises(TypeError):
d.__pow__([])
with pytest.raises(TypeError):
d.__truediv__([])
with pytest.raises(TypeError):
d.__rtruediv__([])
class TestToUnitsContainer:
def test_str_conversion(self):
assert to_units_container("m") == UnitsContainer(m=1)
def test_uc_conversion(self):
a = UnitsContainer(m=1)
assert to_units_container(a) is a
def test_quantity_conversion(self):
from pint.registry import UnitRegistry
ureg = UnitRegistry()
assert to_units_container(
ureg.Quantity(1, UnitsContainer(m=1))
) == UnitsContainer(m=1)
def test_unit_conversion(self):
from pint import Unit
assert to_units_container(Unit(UnitsContainer(m=1))) == UnitsContainer(m=1)
def test_dict_conversion(self):
assert to_units_container(dict(m=1)) == UnitsContainer(m=1)
class TestParseHelper:
def test_basic(self):
# Parse Helper ar mutables, so we build one everytime
x = lambda: ParserHelper(1, meter=2)
xp = lambda: ParserHelper(1, meter=2)
y = lambda: ParserHelper(2, meter=2)
assert x() == xp()
assert x() != y()
assert ParserHelper.from_string("") == ParserHelper()
assert repr(x()) == "<ParserHelper(1, {'meter': 2})>"
assert ParserHelper(2) == 2
assert x() == dict(meter=2)
assert x() == "meter ** 2"
assert y() != dict(meter=2)
assert y() != "meter ** 2"
assert xp() != object()
def test_calculate(self):
# Parse Helper ar mutables, so we build one everytime
x = lambda: ParserHelper(1.0, meter=2)
y = lambda: ParserHelper(2.0, meter=-2)
z = lambda: ParserHelper(2.0, meter=2)
assert x() * 4.0 == ParserHelper(4.0, meter=2)
assert x() * y() == ParserHelper(2.0)
assert x() * "second" == ParserHelper(1.0, meter=2, second=1)
assert x() / 4.0 == ParserHelper(0.25, meter=2)
assert x() / "second" == ParserHelper(1.0, meter=2, second=-1)
assert x() / z() == ParserHelper(0.5)
assert 4.0 / z() == ParserHelper(2.0, meter=-2)
assert "seconds" / z() == ParserHelper(0.5, seconds=1, meter=-2)
assert dict(seconds=1) / z() == ParserHelper(0.5, seconds=1, meter=-2)
def _test_eval_token(self, expected, expression):
token = next(pint_eval.tokenizer(expression))
actual = ParserHelper.eval_token(token)
assert expected == actual
assert type(expected) == type(actual)
def test_eval_token(self):
self._test_eval_token(1000.0, "1e3")
self._test_eval_token(1000.0, "1E3")
self._test_eval_token(1000, "1000")
def test_nan(self, subtests):
for s in ("nan", "NAN", "NaN", "123 NaN nan NAN 456"):
with subtests.test(s):
p = ParserHelper.from_string(s + " kg")
assert math.isnan(p.scale)
assert dict(p) == {"kg": 1}
class TestStringProcessor:
def _test(self, bef, aft):
for pattern in ("{}", "+{}+"):
b = pattern.format(bef)
a = pattern.format(aft)
assert string_preprocessor(b) == a
def test_square_cube(self):
self._test("bcd^3", "bcd**3")
self._test("bcd^ 3", "bcd** 3")
self._test("bcd ^3", "bcd **3")
self._test("bcd squared", "bcd**2")
self._test("bcd squared", "bcd**2")
self._test("bcd cubed", "bcd**3")
self._test("sq bcd", "bcd**2")
self._test("square bcd", "bcd**2")
self._test("cubic bcd", "bcd**3")
self._test("bcd efg", "bcd*efg")
def test_per(self):
self._test("miles per hour", "miles/hour")
def test_numbers(self):
self._test("1,234,567", "1234567")
self._test("1e-24", "1e-24")
self._test("1e+24", "1e+24")
self._test("1e24", "1e24")
self._test("1E-24", "1E-24")
self._test("1E+24", "1E+24")
self._test("1E24", "1E24")
def test_space_multiplication(self):
self._test("bcd efg", "bcd*efg")
self._test("bcd efg", "bcd*efg")
self._test("1 hour", "1*hour")
self._test("1. hour", "1.*hour")
self._test("1.1 hour", "1.1*hour")
self._test("1E24 hour", "1E24*hour")
self._test("1E-24 hour", "1E-24*hour")
self._test("1E+24 hour", "1E+24*hour")
self._test("1.2E24 hour", "1.2E24*hour")
self._test("1.2E-24 hour", "1.2E-24*hour")
self._test("1.2E+24 hour", "1.2E+24*hour")
def test_joined_multiplication(self):
self._test("1hour", "1*hour")
self._test("1.hour", "1.*hour")
self._test("1.1hour", "1.1*hour")
self._test("1h", "1*h")
self._test("1.h", "1.*h")
self._test("1.1h", "1.1*h")
def test_names(self):
self._test("g_0", "g_0")
self._test("g0", "g0")
self._test("g", "g")
self._test("water_60F", "water_60F")
class TestGraph:
def test_start_not_in_graph(self):
g = collections.defaultdict(set)
g[1] = {2}
g[2] = {3}
assert find_connected_nodes(g, 9) is None
def test_shortest_path(self):
g = collections.defaultdict(set)
g[1] = {2}
g[2] = {3}
p = find_shortest_path(g, 1, 2)
assert p == [1, 2]
p = find_shortest_path(g, 1, 3)
assert p == [1, 2, 3]
p = find_shortest_path(g, 3, 1)
assert p is None
g = collections.defaultdict(set)
g[1] = {2}
g[2] = {3, 1}
g[3] = {2}
p = find_shortest_path(g, 1, 2)
assert p == [1, 2]
p = find_shortest_path(g, 1, 3)
assert p == [1, 2, 3]
p = find_shortest_path(g, 3, 1)
assert p == [3, 2, 1]
p = find_shortest_path(g, 2, 1)
assert p == [2, 1]
class TestMatrix:
def test_matrix_to_string(self):
assert (
matrix_to_string([[1, 2], [3, 4]], row_headers=None, col_headers=None)
== "1\t2\n"
"3\t4"
)
assert (
matrix_to_string(
[[1, 2], [3, 4]],
row_headers=None,
col_headers=None,
fmtfun=lambda x: f"{x:.2f}",
)
== "1.00\t2.00\n"
"3.00\t4.00"
)
assert (
matrix_to_string([[1, 2], [3, 4]], row_headers=["c", "d"], col_headers=None)
== "c\t1\t2\n"
"d\t3\t4"
)
assert (
matrix_to_string([[1, 2], [3, 4]], row_headers=None, col_headers=["a", "b"])
== "a\tb\n"
"1\t2\n"
"3\t4"
)
assert (
matrix_to_string(
[[1, 2], [3, 4]], row_headers=["c", "d"], col_headers=["a", "b"]
)
== "\ta\tb\n"
"c\t1\t2\n"
"d\t3\t4"
)
def test_transpose(self):
assert transpose([[1, 2], [3, 4]]) == [[1, 3], [2, 4]]
class TestOtherUtils:
def test_iterable(self):
# Test with list, string, generator, and scalar
assert iterable([0, 1, 2, 3])
assert iterable("test")
assert iterable(i for i in range(5))
assert not iterable(0)
def test_sized(self):
# Test with list, string, generator, and scalar
assert sized([0, 1, 2, 3])
assert sized("test")
assert not sized(i for i in range(5))
assert not sized(0)
|
